Ring measurements are very precise, so try to be as accurate as possible! Select a ring that perfectly fits in the intended finger and measure the inside diameter in millimiters. Here's the chart to determine your US ring size:

US 5: 15.7 mm

US 5.5: 16.1 mm

US 6: 16.5 mm

US 6.5: 16.9 mm

US 7: 17.3 mm

US 7.5: 17.7 mm

US 8: 18.1 mm

US 8.5: 18.5 mm

US 9: 19 mm

TIPS

It is best to measure your finger at room temperature, avoid doing it if your hands are extremely hot or cold. Please note that wide rings feel thicker on the finger, so it might be a good idea to order half size up when buying a thick ring or several rings you plan to stack. If you are unsure about your ring size, please get in touch and I'll be happy to help.